diff --git a/powerwall.sh b/powerwall.sh
index bb711cbc..07490901 100755
--- a/powerwall.sh
+++ b/powerwall.sh
@@ -61,7 +61,7 @@ CHECKTEMP_SERVICE(){
 				[ $temp_diff -lt 0 ] && temp_diff=$(($temp_diff * -1))
 						
 				if [ $(bc -l <<< "$temp_f >= $temp_warn") -eq 1 ] && [ $(bc -l <<< "$temp_f < $temp_crit") -eq 1 ]; then
-					if [ $temp_diff -gt 1 ] || [ "$last_temp" == "1" ]; then
+					if [ $temp_diff -gt 1 ] || [ "$last_temp" = "1" ]; then
 						echo "($datetime) WARNING TEMP: ${temp_f}°F - (Difference of ${temp_diff}°)" | mail -s "${1} TEMP WARNING" $email_alert
 						echo "alert sent"
 						last_temp=$temp_f
@@ -69,7 +69,7 @@ CHECKTEMP_SERVICE(){
 					echo "($datetime) WARNING: ${temp_f}°F - (Difference of ${temp_diff}°)"
 					
 				elif [ $(bc -l <<< "$temp_f >= $temp_crit") -eq 1 ]; then
-					if [ $temp_diff -gt 1 ] || [ "$last_temp" == "1" ]; then
+					if [ $temp_diff -gt 1 ] || [ "$last_temp" = "1" ]; then
 						echo "($datetime) CRITICAL TEMP: ${temp_f}°F - (Difference of ${temp_diff}°)" | mail -s "${1} TEMP CRITICAL" $email_alert
 						echo "alert sent"
 						last_temp=$temp_f
@@ -137,7 +137,7 @@ if [ ${action-x} ]; then
 		update) UPDATE;;
 		checktemp) CHECKTEMP ${2};;
 		checktemp_service) 
-			if [ "${2}" == "stop" ]; then
+			if [ "${2}" = "stop" ]; then
 				service_pid=`systemctl show --property MainPID --value ${SERVICE_NAME[${3}]}`
 				/bin/kill -9 $service_pid
 				/bin/systemctl stop $srvcname